Mobil 1 M 5W40 MB229.51 no longer available
 

I saw this post over at Peachparts.

http://www.peachparts.com/shopforum/3408471-post1.html
I wonder what dealers will use. Will they too switch to lower viscosity oil? I presume MB have approved the new oil, otherwise it wouldn't get the MB229.51 approval.

I visited my local MB dealership a few weeks back to pickup Mobile 5W-40 for my DIY oil change and they advised me it had been replaced with 0W-30. The parts tech mentioned they now use the 0W-30 in all their diesel vehicles.

The oil is labelled "Mercedes-Benz PKW-Synthetic MB 229.52."

I am due for service soon, so will ask same question.

I just had the 10,000 miles service done a few weeks ago on the 14 MB GLK 250 BT and the MB dealer paper work stated 5w40 M1 M formula use, aka MB 229.51. The new 0w30 falls under the MB 229.52. I had bought 24 bottles/4 6 packs of the 5w40 M1 M formula and will use them up before getting the new specification oil. I anticipate better mpg. The lower viscosity I project should yield 1 to 3 mpg BETTER. It is unknown i the wear numbers are same,better or worse than the 5w40 brew.

this applies to Bluetecs only, right?

What is the reason that they do not spec 5 w 30 Mobil 1
It is used in a 638 hp ZR1, but not a GLK.
You can not buy 5 w 40 anywhere , and maybe not 0 W 30.
Is it what they call the " BENZ " tax ???

http://www.bardahl.ca/motor_oils.html
Get whatever you want. Treat your engine well. 229.51 specced.

What does your owners manual and technical data (aka for GASSERS) specify?

So for example, on the 14 MB GLK 350, the Mobil 1 web site "oil finder" indicates M1 0w40. http://www.mobiloil.com/usa-english/....aspx?option=2 It does not meet either the MB 229.51 or 229.52 specifications.

hmmmm, per MOBIL's site, 0W40 is recommended for my car (2012 GLK350 4Matic), screen capture attached below.
P.S. I checked for 2014 4Matic & Base, 0W40 is also approved.

Per the owner's manual, have a few to choose from based on temps with 0W40 as one of them as well.

For Mobil 1 0W40 it says:

Mobil 1 0W-40 motor oil has the following builders approval:
MB-Approval 229.3
MB-Approval 229.5

Those approvals are not good for diesels, but are apparently good for gassers requiring those specs. Confirmed here.

Oil film strength in a slider pad class bearing, of which crank and connecting rod bearings belong, is dependent on the relative speed of the upper and lower pads along with the area of the bearing surface, in this case the block and crank or the crank and the connecting rod. ( see Design of Film Bearing, Robert Trumpler, 1966) The film strength needed in a diesel due to its high compression ratio and lower speed is considerably greater than that needed in a gasoline engine with about 1/2 the compression ratio and higher rotational speeds. The resultants of combustion and accompanying 'blow by' require different additives for acid dispersion and other degradation effects. So oil specified for gasoline engines is usually not suitable for diesels.

This has got to be one of the best posts ever on this site. Short, informative, well-founded.

Still available from Amazon and O Reily's
 

I just bought 8 quarts of the 5/40 ESP.

Mobil 1 ESP Formula M 5W-40 fully synthetic motor oil is made with a proprietary blend of high performance components formulated to be fully compatible with the latest Diesel Particulate Filters (DPF's). Mobil 1 ESP Formula M 5W-40 is designed to provide exceptional deposit control, wear protection and overall performance. Oil change interval: oil change intervals can be as short as 3,000 miles or as long as 15,000 miles on some new cars. Mobil 1 recommends that you follow the oil and filter change frequencies shown in your owner's manual. With Mobil 1's high performance reserves, you can have the confidence to go the full mileage or time frame recommended by the vehicle manufacturer. Mobil 1 is especially suitable for the latest vehicles with extended drain intervals or vehicles with oil monitoring systems that vary oil drain intervals.


https://cimg3.ibsrv.net/gimg/www.mbw...7262eebac8.jpg


Mobil 1 ESP 5W 40

Mobil 1 105856 5W-40 ESP Formula Motor Oil - 1 Quart (Pack of 6)
by Mobil 1
66 customer reviews | 7 answered questions
List Price: $71.99
Price: $53.88 & FREE Shipping. Details
You Save: $18.11 (25%)
In Stock.
Ships from and sold by Amazon.com.
Arrives before Christmas
Want it Friday, Dec. 12? Order within 87 hrs 38 mins and choose Two-Day Shipping at checkout. Details
Size: Pack of 6

Pack of 6


1 Quart (32 Ounces)
Material code - 98HT81
Helps reduce particulate build-up in diesel particulate filters
Helps reduce poisoning of gasoline catalytic converters
Helps reduce deposits and sludge build-up to enable long and clean engine life
Helps reduce oil aging allowing extended drain interval protection
› See more product details
5 new from $47.99

Apparently it has been discontinued. Get it while you can.